233506221 has 8 divisors (see below), whose sum is σ = 335291040. Its totient is φ = 143696112.

The previous prime is 233506213. The next prime is 233506241. The reversal of 233506221 is 122605332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 233506221 - 2³ = 233506213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 233506191 and 233506200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233506201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2993631 + ... + 2993708.

It is an arithmetic number, because the mean of its divisors is an integer number (41911380).

Almost surely, 2^233506221 is an apocalyptic number.

It is an amenable number.

233506221 is a deficient number, since it is larger than the sum of its proper divisors (101784819).

233506221 is a wasteful number, since it uses less digits than its factorization.

233506221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987355.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 233506221 is about 15280.9103459185. The cubic root of 233506221 is about 615.7902644114.

The spelling of 233506221 in words is "two hundred thirty-three million, five hundred six thousand, two hundred twenty-one".